Warning: Spoilers for Aliens vs. Avengers #3!Many of Marvel's most powerful characters come from the Alien crossover is putting its heroes to the ultimate test against the deadly Xenomorphs and other sinister villains.

Aliens vs. Avengers #3 by Jonathan Hickman and Esad Ribić sees the remaining Avengers led by Captain Marvel arriving on Mars after they’re forced to abandon Earth. Though Mars had become home to mutants when the Xenomorphs first invaded Earth, there are only four mutant heroes still standing when the Avengers arrive.

Emma Frost, Wolverine, Armor, and Manifold are revealed as the only surviving mutants, who save Carol Danvers from an attack by both Mister Sinister and Xenomorphs that ultimately kills Tony Stark. Though this battle confirms these heroes’ true invulnerability, it also surprisingly kills off some serious heavy-hitters.

Marvel Reveals the Last Mutants Standing in the Xenomorph War, Assembling the Perfect Post-Apocalyptic X-Men Team

Aliens vs. Avengers #3 by Jonathan Hickman, Esad Ribić, Ive Svorcina, and Cory Petit

The crossover between the iconic sci-fi horror Alien franchise and Marvel’s universe of superheroes has already proven to be deadly for some of the publisher’s most famous characters, but it’s truly shocking that these are the only four mutants remaining during the Xenomorph invasion. Mister Sinister is also still around, siding with the alien creatures, but every other mutant that moved to Mars has officially been wiped out in the Aliens vs. Avengers timeline. The series’ first issue stated that all but one mutant made the planetary move, with Apocalypse staying on Earth to fight. His survival is still unconfirmed.

Colossus wasn’t strong enough against the Xenomorphs, but two other armored heroes have found themselves able to withstand the alien hordes: Emma Frost with her diamond skin form and Armor using her mutant-powered exoskeleton. Along with Wolverine, who may have Marvel’s most iconic healing factor, the three of them apparently can’t be harmed by the creatures. Manifold is another perfect addition to this invulnerable group, because even though he can technically be hurt if attacked, Eden is able to use his unique abilities to communicate with the universe and avoid being in harm's way.

Marvel's Alien Crossover Confirms Major Mutant Casualties in Its Devastating Alternate Future

But Are There Any More Mutants Remaining?

The end of Aliens vs Avengers #3 teases that there could be one more mutant coming back into the mix, with the Wakandan ship carrying Black Panther and his son making an appearance. T’Challa’s son is named Azari here, and he was shown in the first issue to be using some kind of lightning powers, so it’s likely that Azari is the son of Storm and could be the fifth mutant to survive the invasion. However, with Ororo and the other powerhouses of the X-Men seemingly defeated, the remaining mutants still face an uphill battle, especially once the Engineers enter the equation.

In this Alien-infused universe, only a few X-Men are truly equipped to handle the intergalactic horrors.

The creepy scenes with Mister Sinister show various mutants, like Colossus, strung up and nested on the walls of the Xenomorph’s hive. In the Alien movies, people have been rescued from this cocoon-like state before, so it’s not impossible for some supposedly-dead heroes to make a comeback - eventually. However, a comeback would require rescue from those who have actually stayed untouchable during the invasion, and it looks like an older Logan, Emma Frost, Armor, and Manifold are officially confirmed as the best survivalists. In this Alien-infused universe, only a few X-Men are truly equipped to handle the intergalactic horrors.

Aliens vs. Avengers #3 is available now from Marvel Comics!